gtk:label-use-underline (object)

object -- a gtk:label widget
setting -- true if underlines in the text indicate mnemonics

Accessor of the use-underline slot of the gtk:label class. The gtk:label-use-underline function returns whether an embedded underline in the label indicates a mnemonic. If true, an underline in the text indicates the next character should be used for the mnemonic accelerator key.